$def with (data)
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
        <title>$data['title']</title>
        <link rel="stylesheet" type="text/css" href="styles.css" />
    </head>
    <body>
        <div id="container">
            <h4>Hello world</h4>
        </div>
    </body>
</html>
